Chris,
They are stock 44 tooth sprockets that come with chinese motor 2 stroke kits such as Dax and other vendors. I have 5 new ones and 1 used 44 tooth sprocket. 3 of the new ones are chromed and the other 2 new ones aren't.
I'll trade you "even steven" for five of them. I'll hold onto the used one in case move to a lower altitude.

I also have a 41 tooth (9 hole) sprocket which is new.

All my sprockets fit the 415 chain with no problems.

Andy